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Originally Posted by b101uk

If it’s the 500ci engine then like the 330ci engine it uses an end to end water flow for the cylinder head/block therefor there are NO water ports between the head/block only the oil ports, so 330/500ci seldom have head gasket problems.

White smoke after prolonged tick-over/low power use especially if using red diesel is to be expected, as most engines will have had their injection timing set up for DERV, even so dependent on the age of the engine (we are talking bedford 330/500ci here) modern DERV vs. 1970’s DERV has some differences in ignition quality thus timing.

If you start it in the morning do you get a vaporous light smoke that stings your eyes a bit? If so that is normal and is unburnt fuel from slight mistiming vs. a cold engine and it is this that after prolonged tick-over/low power use causes the white smoke as the condensed vapour in the exhaust burns off once you drive off after doing crane work or winching etc etc.

Originally Posted by b101uk

If it’s the 500ci engine then like the 330ci engine it uses an end to end water flow for the cylinder head/block therefor there are NO water ports between the head/block only the oil ports, so 330/500ci seldom have head gasket problems.

White smoke after prolonged tick-over/low power use especially if using red diesel is to be expected, as most engines will have had their injection timing set up for DERV, even so dependent on the age of the engine (we are talking bedford 330/500ci here) modern DERV vs. 1970’s DERV has some differences in ignition quality thus timing.

If you start it in the morning do you get a vaporous light smoke that stings your eyes a bit? If so that is normal and is unburnt fuel from slight mistiming vs. a cold engine and it is this that after prolonged tick-over/low power use causes the white smoke as the condensed vapour in the exhaust burns off once you drive off after doing crane work or winching etc etc.